Remove WebSocket debugger tunnel

[arturpimentel]

What is the purpose of this pull request?

Change toolbelt default behavior so it does not automatically create debug tunnels using websocket

What problem is this solving?

WebSocket support is currently blocking an important infrastructure
migration in VTEX IO. We'll remove this feature so that we can
move on with it.

How should this be manually tested?

1. yarn watch;
2. vtex-test link {{app}} -> should link an app without creating a debug tunnel;

Screenshots or example usage

Before:

After:

Types of changes

• Refactor (non-breaking change that only makes the code better)
• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)
• Requires change to documentation, which has been updated accordingly.

Chores checklist

• Update CHANGELOG.md

[filafb]

LGTM